RE: New Hangar 9 1.50 P-51 Build  
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RE: New Hangar 9 1.50 P-51 Build - 4/15/2008 8:02:36 PM   
kiosk



Posts: 92
Joined: 2/12/2008
From: , FL, USA
Status: offline
that was excellent response, thank you very much, this is interesting

after reading your post I immediately ran to the plane (well...the wreck rather) and took voltage of battery and is reading 5.18v with no load and with my voltmeter I can apply .5 and 1amp loads, at 1 amp draw it dropped to 4.91v....so I think battery is ok?

but it gets better....I then turned the transmitter on, turn the receiver on...receiver and remote antenna light solid indicating link, but guess what? no control response on any servo!!!! and I double checked make sure I had the correct model selected on the DX7 and it was since didnt change it after the crash.....then i turn everything off....turn back on in same seq (trans, then rec) and then it works!!! am sure this what happen but in flite...what heck is the problem? I really feel cheated from Horizon Hobby I want to call them and give them hell but not sure if am doing something wrong..dont think so....

I should let you know this AR7000 is a replacement for the original one I bought which went bad because it wouldnt bind....am sure they sent me back a refurbished crap

I am using JR 2400 batt for servos (the one I checked) and separate same for ignition...both 4.8v

aarrggg....this sucks!!! help!

(in reply to kahloq)
       Post #: 1351

RE: New Hangar 9 1.50 P-51 Build - 4/15/2008 8:24:31 PM   
kahloq



Posts: 1608
Joined: 1/1/2006
From: Fort Collins, CO, USA
Status: offline
how long did you apply the 1 amp load to that battery? From the intial reading of 5.18, you applied a 1 amp load and got 4.91. However, unless you recharged the battery since the plane crashed, the voltage crept up on you as it sat at rest.
The battery could still have been weak, and during a flight, there is a decent draw on the battery. Since you checked the voltage today and it read 5.18, the probability is that the battery was actually lower then this during the fligght and when an applied load such as several servos is applied, that voltage could have dropped off a lot lower then 4.0. Im not saying this is what happened, but it might be a good idea to get the battery checked out as well. Ive still got a bad battery lying around that has a damaged cell. I dont use it for flying, but do use it for servo centering. It will read 5+ volts on a charge, but put a load on it for awile and it drops below 4.

The RX not powering the servos on your first attempt could be a sign that the rx is bad, OR it could be impact damage from the crash.
In any event, it probably needs to be checked out. The circuit board may have sustained a crack or something due to the impact.

(in reply to kiosk)
       Post #: 1352

RE: New Hangar 9 1.50 P-51 Build - 4/15/2008 8:39:32 PM   
kiosk



Posts: 92
Joined: 2/12/2008
From: , FL, USA
Status: offline
No i didnt recharge batteries after, that was last thing on my mind after such a disaster, so actually voltage might been higher when it crashed. It was first flight so battery was pretty well charged up (trickle charging prior to putting stuff in the car). I held 1 amp load for few seconds only, not too long, I really doubt battery is bad thou.
I am almost sure is a bad rx....but it doesnt matter anyways I guess, just read the Spektrum manual and there is a nice BOLD section on no damage liability of any kind due to equipment failure so best I can probably get is a replacement rx

this really blows, we spend all this money and work to put these things together and some stupid problem in radio can take it all away in a second or two.....makes me want to go find another hobby!!!

oh also, there is no crack or visible damage in rx....that entire section is intact, including servos for elevator, rudder and throttle....the biggest impact was to wings and engine. the rx is wrapped in foam pretty well and tie wrapped to a suspended balsa strip...and still there, intact.

< Message edited by kiosk -- 4/15/2008 8:43:31 PM >

(in reply to kahloq)
       Post #: 1353

RE: New Hangar 9 1.50 P-51 Build - 4/15/2008 9:08:45 PM   
kahloq



Posts: 1608
Joined: 1/1/2006
From: Fort Collins, CO, USA
Status: offline
Id say you''ve pretty much isolated it to the rx then. FYI, a Nimh or NiCD will gain voltage as it sits for a couple days since theres no load on it(after having been used), but after that....it''ll start to self discharge.

I definitely feel your pain though. I am dreading flying my P-51, my KMP Me-109, My VQ P-40, my B-17, etc because of all the past problems Ive had with various planes. Most of them not at all related to me. In fact, not any where close to your crash, but I lost a plane on sunday simply because one of the lipo cells dropped out while the plane was flying. A 3s going to a 2s really stunts the power, especially on a heavy wingloaded ME-109.

Prior to that, my F-86 tore its retracts out because it wouldnt rise off the runway for some odd reason(though it had flown a few times before no problem).

One week prior, my 60 size Extra 300 went down. Deadstick on a high bank turn. Think it was either a battery voltage issue which caused all control surfaces to go to failsafe or bad fuel. Plane was totaled.

Prior trip to field to that, totaled a H9 Hellcat on maiden(was my fault cuz I had the ailerons backwards and didnt notice)

Prior to that, Kyosho Me-109 dead sticked ripping the firewall off. Broken prop....cant change it now cuz the hex bolt that kept the spinner on is stripped. Will have to cut the aluminum spinner off just to change the prop once the firewall is fixed. Rudder also badly damaged.
Same day, my Sptifire shattered the firewall on a bad bounce landing cuz some dumb moron with a big gasser wouldnt get the hell off the runway and I had to plunk it down short cuz I was real close to LVC.

Prior trip to the field, my H9 Corsair dead sticked and stalled/spun into the ground totalling it. No reason for the motor to quit, it just did.

Previous trip to field, my sons PTS P-51 had a radio lockout and flew around in circles for 3 minutes on its own until it spun in. No control regained. This is the one that had a bad cell in the rx battery. Didnt know it until afterwards.
.........I could go on. Prior to these....in the last year another PTS went down....think that was also a lockout....was on a 72mhz 5 channel. Lost my H9 Spitfire also due to engine out issues(tank too high in the plane...bad design by H9 in my opinion)
Lost an A-10 cuz one motor quit.
Lost an F-16 due to bad hand launch
etc, etc, etc, etc.

Im only listing these to try and make you feel better. Ive lost a lot of stuff and a lot of money down the drain. There are times when I want to quit as well just because of this, but the planes just look so pretty and I like flying. Soemtimes my confidence gets really low regarding flying. But...more often then not, its a mechanical/electrical issue that i have no control over that causes one of my planes to go down and not my piloting skill.
Besides, I stack several plane boxes in the basement so I always can build something if needed. Kinda forces me to stay with the hobby since I have to say to myself...."well...I''ve got so many planes still in boxes, I might as well just build that one now" and I end up accumulating more boxes as I see them. Like, I really want a Fokker D VII and a this and a that....you know....that bug keeps talking to you Buy it. Buy !! LOL


(in reply to kiosk)
       Post #: 1354

RE: New Hangar 9 1.50 P-51 Build - 4/15/2008 9:14:28 PM   
kahloq



Posts: 1608
Joined: 1/1/2006
From: Fort Collins, CO, USA
Status: offline
Hmmm also should mention the Alfa 40 trainer I was teaching my son to fly on.......wing held on by rubber bands. Had 8 rubber bands on it to hold the wing in place. Flew twice. Checked rubber bands. All looked good. Flew it a 3rd time, and heard in quick succesion...snap, snap, snap. Next thing you see is a fuse racing to the ground and a wing just lazily floating down. Plane was complete loss.

(in reply to kahloq)
       Post #: 1355

RE: New Hangar 9 1.50 P-51 Build - 4/15/2008 9:32:31 PM   
kiosk



Posts: 92
Joined: 2/12/2008
From: , FL, USA
Status: offline
holy crap man!!!! I have no room to complain!!! I dont know how u handle it......am getting drunk tonite and fallin asleep on the couch, calling in sick to work tomorrow!

am so pissed...for once I was able to impress some of the pro's at the field, with the scale mustang and the brand new 4-cycle gasser they didnt even know existed, beautiful plane everyone loved it and now I have to go back with my head down and my little nitro Revolver and its noisy 2-cycle

< Message edited by kiosk -- 4/15/2008 9:35:13 PM >

(in reply to kahloq)
       Post #: 1356

RE: New Hangar 9 1.50 P-51 Build - 4/15/2008 10:11:03 PM   
kahloq



Posts: 1608
Joined: 1/1/2006
From: Fort Collins, CO, USA
Status: offline
Well.... get another one and learn from whatever you can. Horizon can fix the motor Im sure. Gives you an opportunity to change the paint scheme if you like on a new one, etc or keep it the same. Go with a 6v battery and maybe, possibly go to JR X9303 2.4 ghz radio and use the JR921 rx's. These have not exhibited any issues with rebooting. heck, you should be able to use a JR921(or the 9 channel Spektrum rx''s with your DX7...you just wont have access to channel 8 and 9).

If you do decide to get the x9303, Spektrum is offering free rx's when you buy one or two in addition to the one that would come in the radio box. You do have to buy a radio to get the free rx''s though. So, if you bought a 2.4 9303 w rx in box, and also bought 2 whatever size channel 2.4 rx's, you get two of those same type. SInce the ar7000's may still be having reboot issues, you could get two ar9000's or the JR921's and get two free.

Or, if you know someone wanting to get a new 2.4 radio, have them buy the radio and buy one or two extra rx and pay him half price for one ar9000 or JR921 and use it on your DX7.
Its not necessary to get the 9 channel radio, someone could get a DX7 and then buy one or two 9 channel 2.4 ghz rx's and still get the free rx's from Spektrum.

< Message edited by kahloq -- 4/15/2008 10:12:34 PM >

(in reply to kiosk)
       Post #: 1357

RE: New Hangar 9 1.50 P-51 Build - 4/15/2008 10:21:17 PM   
Slviper



Posts: 87
Joined: 1/4/2007
From: Nashville, TN, USA
Status: offline
Kiosk,
I am sorry for your loss and I think it is safe to say we all feel your pain. The way I have found to get over it is keep the faith and put Frankie back together and fly him ASAP.
Steve L

(in reply to kiosk)
       Post #: 1358

RE: New Hangar 9 1.50 P-51 Build - 4/15/2008 11:07:27 PM   
reincarnate



Posts: 765
Joined: 10/1/2006
From: Columbia City, IN, USA
Status: offline
Kiosk,
Hurts like hell just seeing it in pictures. My heart goes out to you, as I too, like Kahloq, have lost many airplanes and dollars. Keep your spirits up, salvage what you can, and build again. It''ll pass. It''ll take a while for sure, but it''ll pass.

Now then, I gotta ask. Before the crash, how did the FG 36 do? Any posts relating to your crash have disappeared, and I don''t know when it happened, if you''d flown the 36 prior or not. Mine hasn''t flown with the Saito yet, and I was wondering. Hopefully not rubbing salt in.

Go ballistic on that Revolver. It''ll take some of the sting out to get back in the air soon.

_____________________________

Are the wheels supposed to fall off when you land? No? How about the engine?

(in reply to Slviper)
       Post #: 1359

RE: New Hangar 9 1.50 P-51 Build - 4/15/2008 11:23:59 PM   
Tisoy909



Posts: 144
Joined: 4/13/2004
From: San Bernardino, CA, USA
Status: offline
Kiosk,
Damnit man, i feel for ya, im here sitting in my room looking at my Frankie Mustang inverted on its stand, cowling off and the 220 is gleaming, staring at me to fly it, and then i looked at your pics of the devastation and all i can say is its painful dood. I know exactly how you feel when you talk about going to the field and letting those pros see something real nice. But then hopefully atleast you took it like a pro and will come back with something better soon. Dont let it get you down man, Mustangs crash because theyre badass planes as im sure you know, we arent talking Piper Cubs here. The new 2.4 Ghz stuff failing is like the ultimate kick in asss if you ask me, i thought those stuff arent supposed to fail, or atleast the best thing after pcm, thats something i would really make an issue about. but for now Just take it positive in someway you can, all rc pilots put their favorite planes in eventually, and atleast you fly them, it''s hard to say but it makes a better rc pilot.
Louie

< Message edited by Tisoy909 -- 4/15/2008 11:30:52 PM >

(in reply to reincarnate)
       Post #: 1360

RE: New Hangar 9 1.50 P-51 Build - 4/15/2008 11:26:48 PM   
captainron


 

Posts: 176
Joined: 6/19/2006
From: PUEBLO WEST, CO, USA
Status: offline
kiosk,
Just spoke with a buddy of mine in Utah. He also flies the DX7 and has had the same problem with his rx. As a matter of fact, he''s had two bad ones until he finally got one that would work. Same problem with the binding thing. I bought the 9303 2.4 and now I''m glad I did. Haven''t flown it yet, building a TF giant scale P-47 for it. Slviper said it well, we all feel your pain. After reading kahloq''s post, I think we all feel a little better. I have another friend in Colorado that flies the DX7 in a 40% COMPOSITE ARF 260 EXTRA. 200 flights and never even a glitch. GO FIGURE!

kahloq,
Maybe your (hybrid) Frankie will be your lucky charm. Bo''s sure been quiet, is he out of town? Must be, you know he would be chiming in. Hope you two get together soon and get your 51 maidened successfully so you''ll be ready for Warbirds Over Denver in June.


DANG! I LOVE THIS HOBBY...............................................................CAPTAIN RON.

(in reply to kiosk)
       Post #: 1361

RE: New Hangar 9 1.50 P-51 Build - 4/16/2008 12:23:59 AM   
kahloq



Posts: 1608
Joined: 1/1/2006
From: Fort Collins, CO, USA
Status: offline
Hybrid? Huh? I dont recall seeing a tree hugger anywhere close to the plane LOL

Might get better glow milage if there was some